James e



(No Model.)

' J. E. MORRIS.

ELECTRIC ARC LAMP.

No. 569,881. Patented Oct. 20, 1896.

3 w H A O UNITED STATES PATENT Onrren.

JAMES E. MORRIS, OF CHESTER, PENNSYLVANIA, ASSIGNOR OF TlVO-THIRDS TO CHARLES E. MORRIS AND JAMES H. DENIS, OF SAME PLACE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent N o. 569,88l, dated October 20, 1896.

Application filed April 2,1896. Serial No. 585,959. (No model.)

To ail whom it may concern: (Z are brushes connecting the frame (1 with Be it known that I, JAMES E. MORRIS, a citithe carbon-rod. zen of the United States, residing at Chester, E is the core, having an annular flange e, in the county of Delaware and State of Pennfrom which extends a depending lug e, to sylvania, have invented certain new and usewhich is hinged a disk 6 provided with a cen- 5 5 f ul Improvements in Electric Lamps; and I do tral aperture through which the carbon-rod hereby declare the following to be a full, clear, passes. c is a tubular piece of metal having and exact description of the invention, such a flared head, said piece fitting in the openas will enable others skilled in the art to which ing in the magnet-frame above the core, the to it appertains to make and use the same. flared head preventing the piece a from en- 60- My invention relates to electric-light mechtirel y slipping through the opening. anism; and it consists of an incandescent-arc F are the carbons, the upper carbon passlight to burn as a single lamp as contradistining through the central aperture of the cover guished from those burning in series. 17 of the globe.

It consists, further, in an arrangement G is the resistance of the lamp. 65 whereby the act of hanging the lamp in posi- The electric current passes into the lamp tion will place it in circuit ready for use. through the wire II to the magnet b, thence In the drawings, Figure 1 is a front elevato the switch O through the wire h, thence tion of myinvention, parts beingbroken away through the wire h to the frame (1, thence and in section. Fig. 2 illustrates my inventhrough the brushes (1 to the carbon-rod D, 70 tion hung in position connected to an incanthence through the upper and lower carbon descent-lamp socket. to the wire h thence through the resistance A represents the upper part of the frame of to the wire h. The core E by the force of the lamp, provided with a ring a, by means of the axial magnetism thus created is drawn as which the lamp is suspended. up within the cavity of the helix, thus draw 75 a is a ring secured to the frame A. ing up the disk 6 until by its tangent im- B is the magnet-frame, secured to the ring pingement against the rod D it clamps the rod a by means of the screws a and also lifts it up to a certain distance. So

I) is the magnet, formed of insulated wire long as this impingement against the rod is coiled around the frame B. maintained it will be firmly held from moving 80 b is a casing around the magnet, to the lower through the rin g. NVhen the electric current part of which is connected the tubular frame is not on, the carbon-rod may readily slide b In the bottom of this frame 19 I secure a through the ring 6 and the core, whereupon globe-socket I), in which a carbon holder b is the force of gravity will cause the upper car- 3 5 secured. bon to rest upon the lower carbon, thus bring- 8 5 I) is the globe, and b the top of the globe, ing the various parts into a closed'circuit posaid top being provided with a central apersition.

ture, tobe hereinafter referred to. If a current of electricity is passed through O is a switch located in the bottom of the the lamp, it instantly operates to lift the car- 40 casing U bon-rod D, thus separating the carbons and 0 D is the carbon-rod, having a head (1. producing the electric light. As the carbons d is a frame consisting of two standards burn away, thus increasing the length of the and a cross-piece connecting said standards, voltaic arc, the strength of the current is dithe cross -piece having a central aperture minished, owing to the increased resistance.

5 through which the carbon-rod is adapted to This weakens the magnetism of the helix, and, 5 pass, said frame being secured on the ring a. the force of gravity being greater than the The object of this frame is to guide the carmagnetic force, the core and carbon move bon-rod and limit its downward movement, downward until the resultant shortening of the aperture in the cross-piece being smaller the voltaie increases the strength of the curthan the head (Z of the carbon-rod. rent and stops the downward movement. Ioo

From the foregoingit will be seen that the carbons are constantly maintained in a proper position with respect to each other auton1atica y.

What I claim, and desire to secure by Letters Patent, is-

In an electric lamp of the character described, the magnet, a core, an annular projection from the bottom of said core, a depending lug integral with said projection, a

disk havinga central aperture and hinged to said lug, the tubular metallic piece a having a flared head, located in said magnet-frame above the core, standards extending from said 

